@article{DM_1997_9_4_a7,
     author = {P. A. Golovach},
     title = {The total vertex separation number of a graph},
     journal = {Diskretnaya Matematika},
     pages = {86--91},
     publisher = {mathdoc},
     volume = {9},
     number = {4},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_1997_9_4_a7/}
}